英文: The authors established an initial velocity model based on the first break time of the actual data, then realized the forward calculation with the improved shortest path ray tracing algorithm, and applied the improved constrained damped simultaneous itera

中文: 根据实际地震数据的初至波时间建立初始速度模型；采用改进的最短路径射线追踪算法进行正演；利用改进的约束带阻尼联合迭代重建技术(CDSIRT)求解大型、稀疏的方程组来反演近地表的速度场。       更详细...

---